Transmissions and Drivetrain Need help with your trans? Problems with your axle?

is a 9 bolt a 7.625" or a 7.75"?

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Old

Jan 12, 2006 | 09:13 AM

#1

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From: Tulsa, OK

Car: 1989 Formula WS6

Engine: L03 305 TBI

Transmission: T-5

Axle/Gears: 10 Bolt; 3.42 Posi

is a 9 bolt a 7.625" or a 7.75"?

I just bought a 9 bolt for my car, and want to get some part for it. In the napa catalog, they show three rearends for my Firebird; a 7.5" (obviously, the stock 10 bolt), a 7.625" and 7.75". Which is the 9 bolt?

Thanks

Old

Jan 12, 2006 | 09:36 AM

#2

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From: Lexington, SC

Car: 1987 SC/1985 TA

Engine: 350/vortec/fitech

Transmission: T56

Axle/Gears: 3.27 9-bolt

nine bolt=7.75

Old

Jan 12, 2006 | 09:38 AM

#3

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Car: Yes

Engine: Usually

Transmission: Sometimes

Axle/Gears: Behind me somewhere

9-bolt = 7.75"

7.5" & 7.625" are the same thing, for all practical purposes, and are the 10-bolt

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